To remove the hyperpigmentation, it is necessary to determine the main cause of the hyperpigmentation. This may be due to the long-term use of iodophor disinfectant to disinfect the wound, which can cause iodophor pigmentation, resulting in the phenomenon of wound pigmentation, in this case, you can promptly stop using iodophor disinfectant and use alcohol disinfectant for disinfection, which can effectively improve the phenomenon of increased pigmentation. If no special treatment is done, it usually takes 2-3 weeks to return to normal on its own. It may also be caused by the formation of scars after the wound has recovered. In this case, patients are advised to use scar removal spirit to improve the growth of scars, which can effectively reduce the phenomenon of hyperpigmentation.